Your alloy should be able to withstand extreme temperatures – we have developed trimal®-41 for such cases

The trimal®-41 alloy (AlSi9Cu3ZnMg) is a die casting alloy with low iron content and has been developed for die casting parts requiring supreme static and dynamic properties, especially at higher temperatures. The castability of trimal®-41 is excellent and low pore volumes are achieved even with large differences in wall thicknesses.

The castability of trimal®-41 is excellent and low pore volumes are achieved even with large differences in wall thicknesses.

The alloy is heat-resistant thanks to the copper content of around three percent. Combined with a zinc content of around two percent, the alloy is hardened after eight days. T5 heat treatment is consequently no longer necessary, but can still be performed.

The manganese content of 0.8% prevents adhesion to the mold while also helping to improve the heat stability. Adding strontium modifies the silicon eutectic, thereby improving ductility. In addition, strontium brings about a certain globulization of the intermetallic phases. Corrosion is restricted by the copper content.

Chemical composition

%

Si

Fe

Cu

Mn

Mg

Ni

Ti

a.G.

Min.

9.00

0.4

0.15

0.03

Max.

11.00

0.3

0.1

0.8

0.30

0.10

0.12

0.2

trimal®-41 can be modified with strontium upon request.

Mechanical properties

The following mechanical properties were measured using real parts and represent reference values for the use of this alloy.

Hardening time at RT in days

Temper

Yield strength Rp0.2 MPa

Tensile strength Rm MPa

Elongation A %

Hardness HB

F

> 130

> 290

> 7

> 75

T0

> 85

> 190

> 10

> 75

Applications

trimal®-41 has been specially developed for crankcases. In principle, it can be used in any application – such as engines and engine parts, casings, and end plates – where high strength is required (e.g. at higher temperatures). The alloy can be used to cast complex designs and very thin walls.

trimal®-41 is extremely machinable and weldable. It can be hard anodized to improve the tribologic properties.